Bartik, T. J. (2014). From Preschool to Prosperity: The Economic Payoff to Early Childhood Education. W.E. Upjohn Institute for Employment Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bartik, Timothy J. From Preschool to Prosperity: The Economic Payoff to Early Childhood Education. Kalamazoo, Michigan: W.E. Upjohn Institute for Employment Research, 2014.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Bartik, Timothy J. From Preschool to Prosperity: The Economic Payoff to Early Childhood Education. W.E. Upjohn Institute for Employment Research, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.